Funny, I have the same project but in Stainless. Just about done checkering the front, not something I'm itching to do again but would probably be a whole lot easier the second time! Lots of parts waiting to go in, yours is looking great, I may have to round butt mine too!

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Now after looking at yours again I think I need to do more deburring and rounding...

Yeah the checkering isn't for everyone, there was definitely some times I thought maybe I was going to ruin the frame or screw up bad enough someone would notice. I don't think I'd hesitate to do another one, but I probably would do 25lpi (you don't have to go so deep) and I'd know a little better where to stop/start so that there wasn't nearly as much cleanup.